With EasyVFR4 it is possible to tune your VHF radio by tapping a frequency in the EasyVFR4 app.
For this to work the radio must be connected to your tablet, some environments allow to do this using WiFi, but the most common used method is by using a bluetooth-to-RS232 serial converter.
These converters can be obtained a various internet shops (we used for example the IRXON BT578 during development and testing), but due to the complexity of wiring our advise is to buy a ready-to-use converter from one of the following suppliers:
The next step is to enable bluetooth; do menu->system->GPS, Radio and AutoPilot Settings.
Scroll down and enable the option [Enable Bluetooth BLE].
Scroll further down to the section [Radio], here you find a number of well-known radios. But even if your radio is not listed, just try one of the
protocols offered as many radios support one or the other protocol. One
word of advice, test from top to bottom: the GTR225 format is the most complete including 8.33khz support. The SL40 and SL30 protocols are predecessors.
With Bluetooth LE enabled, EasyVFR4 will now continuously scan for devices in the area.
To view the list of nearby discovered devices select the [Bluetooth BLE devices] option from the menu.
The left column gives the device name together with the current connection status. The right column allows to select the type of device.
Tap on the [type] button to cycle through the supported device types "AutoPilot", "GPS/Traffic", "Radio" and "undefined". Set the type to "Radio". EasyVFR4 will now try to connect to this BLE device, which becomes apparent by a blue bluetooth icon with a green marker, together with the word "Connected"
Now everything is setup, and EasyVFR4 will offer to tune your radio with a frequency at various places:
Infocard: On the Airfield info page tap one of the frequencies
Infocard: On the Airspaces info page tap one of the blue-colored text items
Radiocard: Tap one of the blue colored text items
Note the keypad symbol top right, this enables a mode to manually enter a frequency:
Now note the clock symbol top right, this gives a list of previously set frequencies so it is easy to switch back
Another tap on the top right symbol will now toggle back to the default radio card.
When a frequency is tapped, a window is shown to select either the Active or Standby side of the radio (some radios only support Standby)
Select the desired side and tap on the [set] button to actually tune the radio.